Find the greatest common factor of 15x^2 y^3 and -18x^3 yz

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

My hour hand points between the 8 and the 9 in 35 minutes it will be the next hour. what time is it ?